Creating a Journal Reversal handler.

wolverine/a-frame-architecture/FinancialApi.Domain/BalancedJournal.cs

@@ -20,4 +20,13 @@ public record BalancedJournal
 
         return new(new JournalEntry(id, description, createdAt, lines));
     }
+
+    public static BalancedJournal CreateReversal(JournalEntry original, string reason, DateTimeOffset now)
+    {
+        var reversedLines = original.Lines.Select(l =>
+                l with { Type = l.Type == EntryType.Debit ? EntryType.Credit : EntryType.Debit })
+            .ToList();
+
+        return Create(Guid.NewGuid(), reason, now, reversedLines);
+    }
 }

wolverine/a-frame-architecture/FinancialApi.Domain/JournalEntry.cs

@@ -7,6 +7,10 @@ public record JournalEntry
     public DateTimeOffset CreatedAt { get; init; }
     public List<JournalLine> Lines { get; init; } = [];
 
+    internal JournalEntry()
+    {
+    }
+
     internal JournalEntry(Guid id, string description, DateTimeOffset createdAt, List<JournalLine> lines)
     {
         Lines = lines;